Insulated AC switch control evaluation board for home ... · Insulated AC switch control evaluation board for home appliances UM2304 User manual UM2304 - Rev 3 - January 2019 For

IntroductionThe STEVAL-GLA001V1 evaluation board is designed to help you develop applications with insulated control of three AC loadsup to 1 kW (230 Vrms) using Triacs and AC switches instead of relays.

To control the STEVAL-GLA001V1, you can use a NUCLEO-F030R8 development board which allows three AC switch controlmodes for load control: continuous or pulse gate current, a timer option, and phase control. You can use also any externalmicrocontroller.

Once you have installed the relevant firmware (freely available at STSW-GLA001V1) on the NUCLEO-F030R8 developmentboard, you can start adjusting the main parameters through a common serial interface like HyperTerminal.

The STEVAL-GLA001V1 evaluation board features a wide input voltage range, low standby power losses, IEC61000-4-4robustness and two low voltage power supplies.

The targeted applications are residential appliances requiring insulation between microcontroller and mains voltage, such aswashing machines and dish washers, micro-wave ovens, cookers, ovens, soya-milk makers, printers, air-conditioners, fridges,water-heaters and heaters.

Figure 1. STEVAL-GLA001V1 evaluation board (top view)

Insulated AC switch control evaluation board for home appliances

UM2304

User manual

UM2304 - Rev 3 - January 2019For further information contact your local STMicroelectronics sales office.

www.st.com

http://www.st.com/en/product/steval-gla001v1

http://www.st.com/en/product/nucleo-f030r8

http://www.st.com/en/product/stsw-gla001v1

1 Evaluation board objectives

1.1 What does this demoboard aim to demonstrate?As said in the introduction, the STEVAL-GLA001V1 evaluation board allows insulated control of AC loads usingAC switches instead of relay solutions.The board embeds a power supply to make it independent from power side.You just have to connect mains voltage, loads and an external microcontroller.On the smart control side, using an STM32 Nucleo board (NUCLEO-F030R8) with the available firmware allowsto easily configure a lot of parameters for specific load control.

1.2 STEVAL-GLA001V1 evaluation board main blocksThe STEVAL-GLA001V1 evaluation board features the following main components:• AC switches (X101, X102 and X103)• A flyback power converter providing:

– VCC_AC: non regulated output and referenced to mains voltage (VCC_AC positive regardingGND_AC)◦ used to control the three AC switches◦ maximum output current: 150 mA

– 5VDC: 5 V positive output, referenced to GND, insulated regarding mains voltage◦ supplies the LEDs and all other electronic parts if VDD selector is set to 5V position◦ maximum output current: 500 mA for all the secondary side (5 V, 3.3 V and VDD mixed)

– 3.3VDC: 3.3 V positive output, referenced to GND, insulated regarding mains voltage.◦ supplies all other electronic parts if VDD selector is set to 3.3 V position.◦ maximum output current: 500 mA for all the secondary side (5 V, 3.3 V and VDD mixed)

– VDD: used to select whether the external microcontroller is supplied with 5 V or 3.3 V (default).

UM2304Evaluation board objectives

UM2304 - Rev 3 page 2/46


https://www.st.com/stm32nucleo



Figure 2. STEVAL-GLA001V1 evaluation board synoptic

VCC_AC VCC_AC

LDO 5 V LDO 3.3 V VDD

Viper

ZVS

To c

usto

mer

µC

boa

rd

GND_AC

5VDC

MODET2 T3 tp+ tp- + -

LED1 LED2 LED3

J203J202

Mains input AC switches and load connections

Power supply primary sideAuxiliary supply for Triac gate control

Power supply insulated secondary side5V/3.3V supply for µC and insulated gate control

ZVS circuit ( frequency detection)

AC Switches gate control User interface

LED4

Power / TimeT1

Inpu t switchFuseM OV

Inpu t capacitor Hi gh vol tage

ind ica torX102 X103X101

VDD selector

L

N

3.3VDCGND

To M

C C

onne

ctor

boa

rd

ZVS

G1

G2 G3

1.3 Targeted applicationsThe main targeted applications are residential appliances where insulation between microcontroller and mainsvoltage is required, such as:• Washing machine, dish washer• Micro-wave oven, cooker, oven, soya-milk maker• Printer• Air-conditioning, fridge• Water-heater, heater

1.4 Main used part numbersThe main part number references used in the STEVAL-GLA001V1 evaluation board are:• AC Switches: T1635T-8FP, ACST310-8B and ACS108-8TN• Rectifier diodes: STPS1L60, STTH1R06 and STPS2H100• Transil: 1.5KE220A• Voltage regulator: LF50ABV and LF33ABV• Flyback IC : VIPER16HD• Voltage reference: TS431AILT• Op-Amp: TSV631ILT

1.5 Operating rangeThe STEVAL-GLA001V1 evaluation board is designed to operate within the following operating conditions:• RMS line voltage range: 90 V to 265 Vrms• Line voltage frequency range: 50 to 60 Hz• Ambient temperature range: 0 to 60°C• Maximum input current: 10 Arms

UM2304Targeted applications

UM2304 - Rev 3 page 3/46


https://www.st.com/en/product/T1635T-8FP

https://www.st.com/en/product/ACST310-8B

https://www.st.com/en/product/ACS108-8TN

https://www.st.com/en/product/stps1l60

https://www.st.com/en/product/STTH1R06

https://www.st.com/en/product/STPS2H100

https://www.st.com/en/product/1-5KE

https://www.st.com/en/product/lfxx


https://www.st.com/en/product/viper16

https://www.st.com/en/product/TS431

https://www.st.com/en/product/TSV631


1.6 PerformanceThe STEVAL-GLA001V1 evaluation board performance characteristics include:• Stand-by losses < 300 mW (@ 240 V)• IEC 61000-4-4 (STEVAL-GLA001V1 evaluation board with NUCLEO-F030R8 development board):

– 2 kV criteria A– 4 kV criteria B

1.7 AC switch load capabilityThe STEVAL-GLA001V1 evaluation board is designed to operate with the following load conditions:

Table 1. Load capability versus ambient temperature and AC switch

Ambient temperature 0 °C 25 °C 60 °C

Load 1 7.2 A = 1650 W 6.2 A = 1430 W 4.6 A = 1050 W

Load 2 1.5 A = 350 W 1.3 A = 300 W 0.9 A = 205 W

Load 3 0.9 A = 200 W 0.75 A = 170 W 0.5 A = 115 W

Total loads power 2200 W 1900 W 1370 W

All of the above values are RMS, for VMAINS = 230 VRMS and with 5% tolerance on the maximum allowed ACswitch junction temperature.Load numbers are given with reference to the following figure.

Figure 3. Loads connection versus AC switches

UM2304 Performance

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2 Getting started

2.1 Safety instructionsCaution: The high voltage levels used to operate the STEVAL-GLA001V1 evaluation board present a serious electrical

shock hazard. This evaluation board must be used in a suitable laboratory by qualified personnel who arefamiliar with the installation, use and maintenance of power electrical systems.The STEVAL-GLA001V1 evaluation board is designed for demonstration purposes only, and shall not be usedeither for domestic or industrial installations.

2.2 STEVAL-GLA001V1 evaluation board insulationThe STEVAL-GLA001V1 evaluation board is composed of the following main functional blocks:• The primary side: includes mains voltage input, AC switches, power supply input, ZVS input and referenced

to mains voltage• The secondary side: includes all microcontroller input/output, power supply output, ZVS output, AC switch

gate control and insulated with respect to mains voltage

Caution: Use insulated measuring equipment and never create a connection between high voltage and insulatedvoltage

Figure 4. High voltage and insulated voltage on STEVAL-GLA001V1 evaluation board

UM2304Getting started

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2.3 Board connection

Figure 5. STEVAL-GLA001V1 evaluation board connections

• J100: connect mains voltage input, complying with Line and Neutral connection and operating voltage (refertoSection 1.5 Operating range)

• J101, J102 and J103: connect directly the load between the two points, complying with the load capability(refer to Section 1.7 AC switch load capability).(1)

• J203: connect to the NUCLEO-F030R8 via the supplied ribbon cable.• J202: connect to external microcontroller (if you do not use the NUCLEO-F030R8) with 5 V and 3.3 V,

complying with power supply output capability (refer to Section 1.2 STEVAL-GLA001V1 evaluation boardmain blocks).

• J200: supplies insulated low voltage 5 V and 3.3 V power (if required), complying with power supply outputcapability (refer to Section 1.2 STEVAL-GLA001V1 evaluation board main blocks).

2.4

1. Caution: Do not connect mains voltage.

STEVAL-GLA001V1 evaluation board start-upFollow this procedure below to start the STEVAL-GLA001V1 evaluation board.

Step 1. Ensure SW100 switch is in the OFF position.Step 2. Set the SW200 jumper:

– to 3.3 V for NUCLEO-F030R8 development board or 3.3 V external microcontroller– to 5 V for 5 V external microcontroller

UM2304Board connection

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Figure 6. SW200 jumper

Step 3. Connect the ribbon cable between:– J203 and the NUCLEO-F030R8– J202 and a board that is not a NUCLEO-F030R8

Step 4. Connect mains voltage on J100Step 5. Connect loads on J101 to J103Step 6. Make sure there is no connection between high voltage and insulated voltage sectionsStep 7. Ensure any measurement equipment has insulated probesStep 8. Switch SW100 on to turn the board on

2.5 Hardware function description

2.5.1 Power supply: primary sideThe power supply primary side includes the following components:• SW100 switch to turn the STEVAL-GLA001V1 evaluation board on or off• F100 fuse and SIOV100 varistor for board protection• C109 capacitor for noise immunity• D102 LED for high voltage presence indication

UM2304Hardware function description

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Figure 7. STEVAL-GLA001V1 evaluation board power supply primary side components

High Voltage

Mains voltage test point

SW100

Auxiliary voltage test point

F100SIOV100

C109

D102

“Line” and “Neutral” test points are available to measure mains voltage.An auxiliary power supply is generated to supply the AC switch gate control: it is not regulated (fluctuates from~12 V to ~23 V), referenced with respect to "Line" potential and can supply up to 150 mA for gate control.“VCC_AC” and “GND_AC” test points are available to measure the power supply voltage level.

2.5.2 Power supply: secondary sideThe power supply secondary side is represented by all the low power output insulated from mains voltage.The transformer output provides 5 V regulated voltage thanks to an LDO regulator. A 3.3 V regulated voltage isgenerated from the 5 V voltage thanks to a second LDO regulator.

Figure 8. STEVAL-GLA001V1 evaluation board power supply secondary side components

Up to 500 mA can be sunk from the secondary side in all, as the 5 V and 3.3 V voltages are in serial.The J200 connector can supply another board or other external electronic functions. In this case, you must ensurethat the sum of all current on the secondary side does not exceed the output current capability.“5VDC”, “3.3V OUT” and “GND” test points are available to measure these two low voltages.

2.5.3 VDD selectorSome of the signals (push button, mode switch and ZVS) connected to the STM32 32-bit ARM Cortex MCU orother microcontroller input are referenced to VDD to protect the voltage input capability of any microcontroller.


UM2304 - Rev 3 page 8/46

Figure 9. STEVAL-GLA001V1 evaluation board VDD selector components

For a 3.3 V compatible microcontroller, VDD must be connected to 3.3 V by setting the SW200 jumper to thebottom (D211 LED lights up); this is the default position.For a 5 V compatible microcontroller, VDD must be connected to 5 V by setting the SW200 jumper to the top(D212 LED lights up).As VDD is connected to either 5 V or 3.3 V, the VDD current capability must always be taken into account inmatters concerning the power supply secondary side.“VDD” and “GND” test points are available to measure VDD voltage level.

2.5.4 Push buttonsPush button signals are available on J202 (user board) and J203 (NUCLEO-F030R8 development board)connectors. They are referenced regarding VDD and GND (refer to Section 2.5.3 VDD selector).

Figure 10. STEVAL-GLA001V1 evaluation board push button components

The push buttons are normally open and the signal is set to VDD. When a button is pressed, the signal is set toGND. When the button is released, the signal returns to VDD.“T1”, “T2”, “T3”, “TP+”, “TP-”, “Power Time +”, “Power Time -” and “GND” test points are available to measurepush button voltage level.

2.5.5 LEDsLED signals are available on J202 (user board) and J203 (NUCLEO-F030R8 development board) connectors.Themicrocontroller voltage level is not important as they use a transistor to be voltage compatible. LED1, LED2 andLED3 are green, while the "Fault" LED4 is red.


UM2304 - Rev 3 page 9/46



Figure 11. STEVAL-GLA001V1 evaluation board LED components

If the LEDx signal is set to 0 (GND), the chosen LED is OFF; if the LEDx signal is set to 5 V, 3.3 V or VDD, thechosen LED is illuminated.“LED1”, “LED2”, “LED3”, “LED4” and “GND” test points are available to measure led voltage level.

2.5.6 Switch modeThe mode selector switch signal is available on J202 (user board) and J203 (NUCLEO-F030R8 developmentboard) connectors. It is referenced with respect to VDD and GND (refer to Section 2.5.3 VDD selector).

Figure 12. STEVAL-GLA001V1 evaluation board mode components

The switch has 3 ON positions, so there is a non-zero voltage on the MODE signal in any position. The followingtable shows MODE signal voltage with respect to the switch position.

Table 2. MODE signal voltage versus switch position

MODE switch position(board silkscreen) MODE voltage MODE voltage with VDD =

3.3 VMODE voltage with VDD = 5

V

On/Off VDD ÷ 1.62 2.04 V 3.09 V

Phase control VDD ÷ 2.62 1.26 V 1.91 V

Timer VDD ÷ 2 1.65 V 2.5 V

“MODE” and “GND” test points are available to measure switch mode voltage level.


UM2304 - Rev 3 page 10/46


2.5.7 Gate control: primary side (high voltage)The AC switch gate control primary side contains three AC switches, the gate control circuit and optionalcomponents which can be implemented to improve AC switch performance.

Figure 13. STEVAL-GLA001V1 evaluation board AC switch gate control (primary side) components

“VCC_AC”, “GND_AC”, “OUT1”, “G1I”, “OUT2”, “G2I”, “OUT3” and “G3I” tests points are available to measureauxiliary voltage, AC switches output and gate voltage level.

Caution: All these test points are referenced to high voltage.See Section 12 AC switch performance improvements for more information on how to improve AC switchperformance.

2.5.8 Gate control: secondary side (insulated voltage)The gate command signals are available on J202 (user board) and J203 (NUCLEO-F030R8 development board)connectors. The microcontroller voltage level is not important as the optocoupler LED is voltage compatible. TheG1 signal controls X101 Triac (OUT1, T1), the G2 signal controls X102 AC switch (OUT2, T2) and the G3 signalcontrols X103 AC switch (OUT3, T3).

Figure 14. STEVAL-GLA001V1 evaluation board AC switch gate control (secondary side) components

If the Gx signal is set to 0 (GND), the corresponding AC switch is turned off; if the Gx signal is set to 5 V, 3.3 V orVDD, the corresponding AC switch is switched on.“G1”, “G2”, “G3” and “GND” test points are available to measure gate command voltage level.


UM2304 - Rev 3 page 11/46


2.5.9 ZVSThe ZVS (Zero Voltage Switching) signal is available on J202 (user board) and J203 (NUCLEO-F030R8development board) connectors. It is referenced with respect to VDD and GND (refer to Section 2.5.3 VDDselector).The ZVS signal represents the mains voltage with respect to zero crossing. It allows synchronizing AC switchcontrol with the mains voltage frequency.As shown on the figure below, if the mains voltage is positive (neutral with respect to line), the ZVS signal is set toGND. If the mains voltage is negative (neutral with respect to line), the ZVS signal is set to VDD.

Figure 15. ZVS signal versus mains voltage

ZVS signal (« ZVS » regarding « GND »)

ZVS signal (« N_ZVS » regarding « L_ZVS »)

VMAI NS signal (« N » regarding « L »)

Figure 16. STEVAL-GLA001V1 evaluation board ZVS components

From the primary side, “Line”, “Neutral”, “N_ZVS” and “L_ZVS” test points are available to measure ZVS voltagelevel.

Caution: These test points are referenced to high voltage.From the secondary side (low voltage and insulated), “ZVS” and “GND” test points are available to measure ZVSvoltage level.


UM2304 - Rev 3 page 12/46


3 Evaluation board operation with STM32 Nucleo board

3.1 OverviewAs shown in Figure 17. Ways to control the STEVAL-GLA001V1 evaluation board, you can either connect theSTEVAL-GLA001V1 to your own board and microcontroller, or to the X-NUCLEO-IHM09M1 interface board forSTM32 Nucleo mounted on a NUCLEO-F030R8 development board, which is in turn connected to a PC via aUSB cable (Type A/Mini A).

Figure 17. Ways to control the STEVAL-GLA001V1 evaluation board

User microcontrollerUser board

Nucleo

STEVAL-GLA001V1 board

USB

Provided ribbon cable

Ribbon cable

1st way: use Nucleo board to control the STEVAL-GLA001V1 board

2nd way: use user board with user microcontroller to control the STEVAL-GLA001V1

J202

J203

X-NUCLEO-IHM09M1 interface board

To use the STEVAL-GLA001V1 with the NUCLEO-F030R8 the latter must first be programmed with the firmwareyou can download from the STSW-GLA001V1 web page (for detailed instructions, refer to the firmware usermanual).After programming the NUCLEO-F030R8, set jumper JP5 to the E5V position.

Figure 18. Connection setup between for STEVAL-GLA001V1 evaluation board, X-NUCLEO-IHM09M1connector expansion board and NUCLEO-F030R8 development board

UM2304Evaluation board operation with STM32 Nucleo board

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http://www.st.com/en/product/x-nucleo-ihm09m1





3.2 Triac controlA Triac or AC switch can be controlled through a DC or pulse gate command. If you apply a gate current until theTriac current exceeds IL (latching current), the Triac remains ON even if the gate current is removed. The Triacturns OFF when the Triac current reaches zero, if the gate control is released.

Figure 19. Triac behavior according to gate control and latching current

Gate control

VM AINS

IT IL

IL

Triac current doesn’t reach IL before end of gate pulse Triac doesn’t remain ON Triac current reaches IL before

end of gate pulse Triac rem ai ns ON

Triac turns-off when the Triac current reaches zero and if no

gate pulse is app l ied

You can control a Triac gate in one of the following ways:1. DC gate control: a continuous gate current is applied. This ensures the TRIAC turns ON, but it is energy-

consuming.2. Pulse gate control: a pulse gate current is applied. The gate power consumption is lower but you need to

verify that IL is reached before releasing the gate current.

3.3 Operating modeThe following operating modes are available to use the loads by controlling the AC switches:1. ON/OFF basic mode: the Triac is ON during the whole period. So the load current is a full-wave sinusoidal

current. This control mode is usually used to control fans, pumps or resistive loads. The gate signal can beDC or pulsed.

2. ON/OFF timer mode: the Triac is ON for a defined period, so the load current is a full-wave sinusoidalcurrent for a chosen duration. This control mode is usually used to control fans, pumps or resistive loads,and also for specific applications like lighting and other home control applications with timer functions.

3. Phase control mode: the Triac turns ON with a delay with respect to the ZVS. Current conduction starts atthe end of the half-cycle. The current conduction per half-cycle can then be set between 0 to half-a-cycle inorder to control the load power. This control mode is usually used to control fans, universal motor speeds orlamp brightness. Only the pulse gate command is available.

The above loads (and corresponding AC switches) can be controlled at the same time or individually. To controlseveral AC switches at the same time, the control mode and parameters are common to all the AC switchcontrols.

3.3.1 Mode selectionThe “ON/OFF basic”, “ON/OFF timer” and “Phase control” operating modes are selectable through the three-position “MODE” switch (SW201), see Section 2.5.6 Switch mode for more information.

UM2304Triac control

UM2304 - Rev 3 page 14/46

3.3.2 ON/OFF basic mode

Figure 20. ON/OFF control in basic mode (DC command on the left and pulse command on the right)

Triac push button

Triac gate command

VMAINS

IT

Current in the Triac turns off at next

zero current crossing

Wait for next zero voltage crossing

tp tp

push push

Triac push button

Triac gate command

VMAINS

IT




push push

This mode is selected through the MODE switch (refer to Section 3.3.1 Mode selection).After you push the AC switch/Load button (Tx) ON, the NUCLEO-F030R8 development board waits for the nextZVS, lights ON the corresponding LED (LEDx) and then activates the corresponding AC switch gate (Gx).To stop the AC switch/load, push the AC switch/Load button (Tx) ON again: the gate is deactivated and the LEDis switched OFF.By default, the gate command is a pulsed signal with a duration equal to the “tp” value. You can modify this gateON duration by pushing on the “TP+” button (to increase ON time) or “TP-” button (to decrease ON time). Thegate command becomes a DC signal when the “tp” value reaches the half-period.All parameters (range, default value, unit, step, etc.) used to configure the load control for this mode aredescribed in Section 3.6 User interface. For more details regarding the hardware components involved in thismode, refer to Section 2.5 Hardware function description.

UM2304Operating mode

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3.3.3 ON/OFF timer mode

Figure 21. ON/OFF control in timer mode (DC command on the left and pulse command on the right)

Triac push button

Triac gate command

VMAINS

IT




tp tp

push

Triac push button

Triac gate command

VMAINS

IT




push

OnTime OnTime

This mode is selected through the MODE switch (refer to Section 3.3.1 Mode selection). This mode operation issimilar to the ON/OFF basic mode, but a timer stops the AC switch/Load instead of pushing a button.When you push the AC switch/Load button (Tx) ON, the NUCLEO-F030R8 development board waits for the nextZVS, lights ON the corresponding LED (LEDx) and then activates the corresponding AC switch gate (Gx).The AC switch/load is stopped after the timer (“OnTime” duration) has elapsed: the gate is deactivated and theLED is switched OFF.By default, the gate command is a pulsed signal with a duration equal to “tp” value. You can modify this gate ONduration by pushing on the “TP+” button (to increase ON time) or “TP-” button (to decrease ON time). The gatecommand becomes a DC signal when “tp” value has reached the half-period. You can also modify the timerduration “OnTime” by pushing on the “Power Time +” button (to increase timer duration) or “Power Time -” button(to decrease timer duration).All parameters (range, default value, unit, step, etc.) used to configure the load control for this mode aredescribed in Section 3.6 User interface. For more details regarding the hardware components used for this mode,refer to Section 2.5 Hardware function description.


UM2304 - Rev 3 page 16/46


3.3.4 Phase control mode

Figure 22. Phase control (zoom on the right)

td td td

td tp

MainsPeriod/2

MainsPeriod

tp =MainsPeriod

2td

Triac push button

Triac gate command

VMAINS

IT




push push

This mode is selected through the MODE switch (refer to Section 3.3.1 Mode selection).When you push the AC switch/Load button (Tx) ON, the NUCLEO-F030R8 development board waits for the nextZVS, lights ON the corresponding LED (LEDx) and then activates the corresponding AC switch gate (Gx).The AC switch/load is stopped when the user pushes the AC switch/Load button (Tx) ON again: the gate isdeactivated and the LED is switched OFF.The gate command is a pulsed signal with the time delay equal to “td” value. You can modify this time delay bypushing on the “Power Time +” button (to decrease “td” and so increase load power) or “Power Time -” button (toincrease “td” and so decrease load power).“td” represents the time delay before turning on the AC switch at each cycle. The “td” value is selected from atable consisting of a configurable column number (see Figure 23. td value table details). “td” values should beentered in ascending order (lowest index for lowest “td” value and highest index for highest “td” value).For safety reasons, on first load control with new values, the NUCLEO-F030R8 firmware will start with the highest“td” value (highest index), which corresponds to the minimum power.“td” is decreased (according to the tablevalues) when “Power Time +” is pressed and increased when “Power Time -” is pressed.

Figure 23. td value table details

Power -+td value- +

Power Time - button

Power Time + button

Additionally, a soft-start and a soft-stop function are implemented in this mode to allow starting and stopping theload gradually. The number of steps is configurable.


UM2304 - Rev 3 page 17/46


Figure 24. Soft-start operation (on the left) and soft-stop operation (on the right)

Wait for next zerovoltage crossing

tp_1

td_1 td_(x-1)

tp_(x-1)

td_2

tp_2 tp_1

td_1 td_(x-1)

tp_(x-1)

td_(x-2)

tp_(x-2)Triac gate command

VMAINStd

tp

td

tp

All parameters (range, default value, unit, step, etc.) used to configure the load control for this mode aredescribed in Section 3.6 User interface. For more details regarding the hardware components used for this mode,refer to Section 2.5 Hardware function description.

3.4 ZVS functionThe ZVS (Zero Voltage Switching) function allows control of the loads in synchronization with the mains voltage,which is especially useful for avoiding excessive dI/dt at turn ON that can damage the AC switches. The ZVSsignal versus mains voltage is shown below.

Figure 25. ZVS signal versus mains voltage (zoom on the right)

The real ZVS signal is not exactly synchronized with mains voltage due to component tolerance and delay. Avirtual delay “td_zvs” is implemented in the NUCLEO-F030R8 development board firmware to counter thisproblem. You measure it with an oscilloscope and modify the value through the user interface (for more details,refer to firmware user manual).In case of inductive load use, you must take into account the delay due to the STEVAL-GLA001V1 evaluationboard and the phase shift due to the load. By adding these two delays, you can control the inductive load exactlyat the zero current crossing.Figure 26. Parameters in case of inductive load (example on the right) shows an example of inductive load use:the “Final value” entered in “td_zvs” should be the difference between the “td_zvs” delay and the inductive loaddelay. For example, “td_zvs” due to the STEVAL-GLA001V1 is 1000 µs, and inductive load delay is 2500 µs: thefinal value is “td_zvs” – “inductive load delay” = 1000 – 2500 = –1500 µs.

Figure 26. Parameters in case of inductive load (example on the right)

In phase control mode, the “zcs_margin” parameter lets you avoid period overlap. This parameter should be takeninto account in "td" calculation: a half-period should be equal to the sum of “tp”, “td” and “zcs_margin” as shown inFigure 27. Parameters for phase control mode.

UM2304ZVS function

UM2304 - Rev 3 page 18/46



Figure 27. Parameters for phase control mode

Triac gate commandVMAI NS

tp

MainsPeriod/2

td

zcs_margin

The firmware is able to manage ZVS circuit presence: according to the “zvs_hw” parameter value, some modeoperations may or may not be available. With the STEVAL-GLA001V1, the ZVS parameter is activated by default.In case of firmware re-use with user-own design, ZVS function could be deactivated..Table 3. Modes and gate controls available vs zvs circuit implementation lists all load modes and gate controltypes available regarding ZVS circuit implementation.

Table 3. Modes and gate controls available vs zvs circuit implementation

ZVS circuit Load control Timer mode Gate control

Not available ON/OFFNo

DCYes

AvailableON/OFF

NoPulse

DC

YesPulse

DC

Phase control Not available Pulse

All parameters (range, default value, unit, etc.) used to configure the ZVS delay are described in Section 3.6 Userinterface. For more details regarding the hardware components used for this function, refer toSection 2.5 Hardware function description.

3.5 Fault LEDThe red fault LED lights ON to indicate an error. Your can determine the fault type through the user interface (formore details, refer to firmware user manual). For more details regarding the hardware components used for thisfunction, refer to Section 2.5 Hardware function description.

3.6 User interfaceThe user-friendly interface is designed to let you read and write parameters easily. This interface consists of manycommands (described in a menu) available through a terminal emulator such as HyperTerminal or TeraTerm. Thelist of commands is shown below.

UM2304Fault LED

UM2304 - Rev 3 page 19/46

Figure 28. User interface list of commands

The commands perform the following functions:• read board state and configuration parameters• set configuration parameters• start and stop AC switches• store configurations• restore configuration to factory settings

Table 4. Readable parameters

Name Description Unit

Mains period Mains voltage period ms

ZVS_hw ZVS function implemented NA

Operating mode Operating mode selected (SW201switch position) NA

td_ZVS ZVS delay µs

PBTlow Push button pressure delay ms

Tx AC switch / Load state NA

LEDx LED state NA

tp Gate control pulse time (for ON/OFFbasic and timer modes) µs

tp_step Step for increasing or decreasing tp µs

td Current gate control turn-on delay (forphase control mode) µs

td_buffer td table NA

Index Current td table index NA

N_td td table columns number NA

td_min Minimum of td value range µs

td_max Maximum of td value range µs

Soft Start/Stop n_step Number of steps for soft-start and soft-stop NA

UM2304User interface

UM2304 - Rev 3 page 20/46

Name Description Unit

OnTime Timer duration (for timer mode) s

OnTime_step Step for increasing or decreasingOnTime s

ZCS margin Margin before next cycle (for phasecontrol mode) µs

System State State of the STEVAL board NA

Fault Code Information about board error NA

Table 5. Configurable parameters

Name Description Unit Range Default value Storable

tpGate control pulse time (forON/OFF basic and timermodes)

µs 10 to (Mains Period ÷2) 5000 Yes

tp_step Step for increasing ordecreasing tp µs 10 to 1000 1000 Yes

on_time Timer duration (for timermode) s 0 to 10 000 5 Yes

on_time_step Step for increasing ordecreasing on_time s 1 to 10 1 Yes

zcs_margin Margin before next cycle (forphase control mode) µs 100 to 1000 100 Yes

pbtlow Push button pressure delay ms 100 to 500 100 Yes

zvs_hw ZVS function implemented NA 0 or 1 1 Yes

td_zvs ZVS delay µs (- Mains Period ÷ 4) to(Mains Period ÷ 4) 0 Yes

td_min Minimum td value range µs 0 to td_max-1 0 Yes

td_max Maximum td value range µs(td_min+1) to (MainsPeriod ÷ 2-zcs_margin)

Mains Period ÷2-zcs_margin No

td_index td table index NA 1 to N_td N_td Yes

n_step Number of steps for soft-startand soft-stop NA 5 to 100 10 Yes

td_buffer td table NA 5 to 100 20 Yes

td_element td value of chosen index NA td_min to td_max NA Yes

For more details about terminal configuration and use, and about parameters, refer to the STSW-GLA001V1firmware user manual.

UM2304User interface

UM2304 - Rev 3 page 21/46


4 Evaluation board operation without STM32 Nucleo board

4.1 User connector inputs and outputsIf you wish to connect the STEVAL-GLA001V1 evaluation board to your own-board embedding anothermicrocontroller, refer to the following figure and table for details regarding the signal type of each pin.

Figure 29. User connector pinning

Table 6. User connector pin description

Pin no. Name Description Type from user side Voltage level

1 NC Not connected NA NA

2 GNDPower supply GND(insulated from mainsvoltage)

Power supply GND

3 ZVS ZVS picture signal Input VDD/GND

4 G1 AC switch n°1 gatecontrol command Output VDD/GND

5 LED1 LED n°1 command Output VDD/GND


7 T1 AC switch n°1 controlpush button Input VDD/GND



10 MODE Mode switch voltage InputRefer toSection 4.2 MODEswitch voltage


12 TP- tp decrease pushbutton Input VDD/GND


14 TP+ tp increase push button Input VDD/GND

UM2304Evaluation board operation without STM32 Nucleo board

UM2304 - Rev 3 page 22/46


Pin no. Name Description Type from user side Voltage level

15 3.3VDC 3.3 V power supply (tosupply user board) Power supply 3.3 V referenced to

GND


17 5VDC 5 V power supply (tosupply user board) Power supply 5 V referenced to GND

18 Power Time + Power or timer durationincrease push button Input VDD/GND

19 Power Time - Power or timer durationdecrease push button Input VDD/GND


4.2 MODE switch voltageMODE switch (SW201) is a three-positions switch, and each position is connected to different resistors whichchange voltage on the MODE signal (see Section 2.5.6 Switch mode).

UM2304MODE switch voltage

UM2304 - Rev 3 page 23/46

5 Schematic diagrams

Figure 30. STEVAL-GLA001V1 - AC input

N_inp

L_inp

N1

BZX79C2V4

L

321

TP105

10nF/275Vac/X2

C108

TP100

N_inp

C109

2

68nF/275Vac/X2

D101

3.3k/0.5W

J100

conn_3pts

U

1N4007

S14K300/EPC

D103

F100

L_inp

FUSE 10A/250V

R121 SIOV100

SW100 SW KEY-SPST/10A

red LED

N

D102

L

Figure 31. STEVAL-GLA001V1 - ZVS detection

620k

TP104

ZVS

GND

D100 6

3

VDD

R101

10nFC100

TLP187

N

L

BAT48Z

TP101

620k

TP102

L_ZVS

R100 ZVS

U100 4.7k

R102

N_ZVS

4

1

UM2304Schematic diagrams

UM2304 - Rev 3 page 24/46

Figure 32. STEVAL-GLA001V1 - Triac gate control

1nF

G3

10nF

R116

GND_AC

TP106

G2I

TP108

TP115

G3I

1

GND_AC

R113

TLP187

GND

G1

R106

R105

1k

C103

U103

VCC_AC

150 / 2W

R107

GND_AC

G2I

4

G2

C102

GND

TP110

4Q100

TLP187

10nF

66

GND_AC

1k

3

1k

TLP187

6

R104

4

G1I

374 / 0.5W

TP117

R115

GND

4.7k

R114

560 / 0.5W

150 / 2W

TP107 G3

560 / 0.5W

R108

10nF

G1I

TP109

1

R112

U101

GND

G2

C104

U102

1

374 / 0.5W

R103

G1TP114

C101

2k

33

1k

G3I

SMBTA42

R117

Figure 33. STEVAL-GLA001V1 - Triacs/ACS connection

G2IG1I G3I

TP113 OUT1

U

ACST310-8B

NC

OUT3TP112

OUT_T2

R110

TP111 OUT2

R119

VCC_AC

N

SIOV101

NCR111

X103

220

N

X102

220R109 NC

T1635T-8 + heatsink 17C/W

J102

C106

NC

VCC_AC

J101

OUT_T3

C107 NC

N

J103

12

ACS108-8TN

TP116

12

R120

OUT_T1

12

NCX101


UM2304 - Rev 3 page 25/46

Figure 34. STEVAL-GLA001V1 - Power supply

R204 greenLED

C209

2

C205

C20110uF

R2281k

U201

TSV631ILT

10

5

C207100uF

150n

TP201

LF33ABV+heatsink35C/WN

STTH1R06

TP205

48.7k

R231

3.3VDC

C20022uF

R207

U205

-

+

VDDCOM

P

5VDC

10V/electrolytic

D203

VDD

U204

30V

conn_3pts

3.3VDC

D202

3

LF50ABV+heatsink35C/W

TP200

15k

TS431AILT

10V/electrolytic

C2043.3uF

10k

1

450VC2063.3uF

R226

10V

VDD

2

TP202

GND

1

U202

100k

R232

GND2

D201

450V

R202

U203COMP

3.3VDC

TP207

1.5k

viper16HD DRAIN

321

4

LIM

U200

T200

5V

3. 3V

ESR<30mohmLowESR

ESR<15mohm

1N4007

NC

STPS1L60

R227

GND

R201

D212

Drain

R203

OUT 3

5

IN1

5VDC

1.5KE220A

TP203

8

C211

100k/0.05%

OUT 3

100nF

PC817

4

10R/2W6

GND

GND

L200

BAT48Z

1

26.1k/0.1%

J200

4

R205

C210NC

D204

VDDselector

1mH

3.3VDC

C203

30V

9

2

IN1

3.9k

R230

D211

VCC_AC

TP211

C2081uF

100k

5VDCR200

C202

220uFL

5VDCVOUT

LowESR

greenLED

D205

3.3nF

5VDC

7

myrra74015

STPS2H100

GND100nF

SW200

3

GND_AC

12R/2W

FB

1.5k

2GN

D

D200

VDD

R229

Figure 35. STEVAL-GLA001V1 - LED indicators

1.5k

TP217LED2

R215 R217

R211

LED4

10k

D209green LED

R208

TP214

red LED

R2101.5k

R218

2N7002

GND

1.5k

LED3 Q2022N7002

10k

Q2012N7002

TP216

1.5k

TP215

2N7002

GND

LED3

LED4

5VDC

green LED

R209

D207 D210

5VDC

LED2

5VDC

Q203

GND

5VDC

R21610k

LED1

D208

Q200

GND

LED1

green LED

10k

Figure 36. STEVAL-GLA001V1 - Commands/parameters push buttons

TP221T3

SW203

SW206 SW207

C216

10nF

C219

T3

R225

GND

R220

tp-tp-

VDD VDD

10nF

Power/Time-

T2tp+

10nF

Power/Time+

10kR221

C214C213

10nF

TP220T2

R219

SW208

SW204

TP224 10k

R222

10nF

SW202

C217

TP219T1

TP222

T1C215

10k

Power/Time+

10nF10nF

10k

VDD

TP223R224

TP226

10k

tp+

VDD

TP225

VDD

Power/Time-

R223

C218

SW205

VDD

10k

10k

VDD


UM2304 - Rev 3 page 26/46

Figure 37. STEVAL-GLA001V1 - Mode selector switch

R213

MODE

6VDD

R2121k

2

1k

SW201

54

GND R214

MODE

1SW DPDT 3 POS

3

620

TP212

Figure 38. STEVAL-GLA001V1 - Customer board connector

LED3 15

19

11 12T3

ZVS

10

13

LED1 7

LED4

1

CON20A

18

3

8

G14

G3

2

65

T1

20

MODE

5VDC Power/Time+Power/Time-

T2

LED23.3VDC

tp-16

9

17

14 tp+

GND

J202

G2

Figure 39. 34-Pin ST board connector

23

GND

J203

21

31

20

8

34

G1

22

7

33

T2

2932

Power/Time-

18

28

9

265VDC

LED4

6LED1

1

CON34A

T3

5

17

11

30

LED3tp+

14

1012

1513

16

27

ZVS 3

tp-

G3

G2

MODE

24

19

25

2

Power/Time+

T1

4

LED2


UM2304 - Rev 3 page 27/46

6 Bill of materials

Table 7. STEVAL-GLA001V1 bill of materials

Item Q.ty Ref. Part/Value Description Manufacturer Order code

1 11

C100, C101,C102, C103,C213, C214,C215, C216,C217, C218,C219

10 nF 50 V min±10% SMD1206

Ceramiccapacitor Any Any

2 1 C1041 nF 50 V min±10% SMD1206


3 2 C106, C107 Not connected Ceramiccapacitor Any Any

4 1 C108

68 nF 275 Vacmin ±10%6x10mm pitch7.5mm X2


5 1 C109

10 nF 275 Vacmin ±20%4x13mm pitch10mm X2


6 1 C200

22 µF 450 Vmin ±20% Diam13mm pitch5mm

Aluminiumcapacitor Any Any

7 1 C201

10 µF 450 Vmin ±20% Diam13mm pitch5mm


8 1 C202

220 µF 10 Vmin ±20% Diam8mm pitch3.5mm

Aluminiumcapacitor Nichicon RL81C221MDN1KX

9 2 C203, C205100 nF 10 Vmin ±5% SMD1206 C0G

Ceramiccapacitor Kemet C1206C104J3GACTU

10 2 C204, C2063.3 µF 10 V min±20% Diam5mm pitch 2mm


11 1 C207

100 µF 30 Vmin ±20% Diam8mm pitch3.5mm

Aluminiumcapacitor Nichicon RL81V101MDN1KX

12 1 C2081 µF 30 V min±10% SMD1206 X7R

Ceramiccapacitor TDK C3216X7R1H105K160AB

13 1 C2093.3 nF 16 V min±10% SMD0805


14 1 C210 Not connected Ceramiccapacitor Any Any

UM2304Bill of materials

UM2304 - Rev 3 page 28/46


15 1 C211150 n 16 V min±10% SMD0805


16 2 D100, D205BAT48Z 350mA min 40 Vmin SOD-123

Diodes Any Any

17 2 D101, D2001N4007 1 A min1000 V minDO-41

Diodes Any Any

18 2 D102, D210 PLCC2 Red LED Vishay VLMT3100-GS08

19 1 D103BZX79C2V4 2.4V / 0.5 WDO-35

Diode Any Any

20 1 D2011.5KE220AVBR 220 VDO-201

Transil 1500 W ST 1.5KE220A

21 1 D202STTH1R06 1 Amin 600 V minDO-41

600 V, 1 ATurbo 2 ultrafastdiode

ST STTH1R06

22 1 D203STPS2H100 2A min 100 Vmin DO-214AC

100 V, 2 A SMAFlat, SMB Flatpower Schottkyrectifier

ST STPS2H100

23 1 D204STPS1L60 1 Amin 60 V minDO-214AC

60 V, 1 A lowdrop powerSchottkyrectifier

ST STPS1L60

24 5D207, D208,D209, D211,D212

PLCC2 Green LED Vishay VLMC3100-GS08

25 1 F100 FUSE 5 x 20mm Fuse support Multicomp MC000830

26 2 J100, J200 3 points pitch5.08 mm Connector Weidmuller PM 5.08/3/90 3.5 SW

-1760520000

27 3 J101, J102,J103

2 points pitch5.08 mm Connector Weidmuller PM 5.08/2/90 3.5 SW

-1760510000

28 1 J202 2x10 pointspitch 2.54 mm Connector Amphenol T821120A1S100CEU

29 1 J203 2x17 pointspitch 2.54 mm Connector Molex 70246-3404

30 1 L2001 mH diameter9 mm pitch 5mm

Inductor WurthElektronik 744741102

31 1 Q100SMBTA42 300V min / 0.5 Amin SOT23-3

NPN Any Any

32 4 Q200, Q201,Q202, Q203

2N7002 60 Vmin / 100 mAmin SOT23-3

N-Channel Any Any

33 2 R100, R116 4.7 k 1/8 W min±5% SMD 0805 Resistors Any Any

34 2 R101, R102620 k 1/4 W min±5% axial /through-hole

Resistors Any Any


UM2304 - Rev 3 page 29/46

https://www.st.com/en/product/1-5KE

https://www.st.com/en/product/STTH1R06

https://www.st.com/en/product/STPS2H100

https://www.st.com/en/product/stps1l60


35 2 R103, R104 560 1/2 W min±5% SMD 0805 Resistors Any Any

36 7

R105, R108,R112, R113,R212, R214,R228

1 k 1/8 W min±5% SMD 0805 Resistors Any Any


38 2 R109, R202 Not connected Resistors Any Any


40 1 R114 2 k 1/8 W min±5% SMD 0805 Resistors Any Any

41 2 R115, R117

150 2 W min±5% axial/through-holepitch 15 mm

Resistors Any Any

42 2 R119, R120 Not connected Resistors Any Any

43 1 R121 3.3 k 1/2 W min±5% SMD 1206 Resistors Any Any

44 1 R200

10 2 W min±5% axial/through-holepitch 15 mm

1/ carboncomposition or2/ carbon film

Any Any

45 1 R201

12 2 W min±5% Axial /Through-holePitch 15 mm

1/ carboncomposition or2/ carbon film

Any Any

46 1 R203 3.9 k 1/8 W min±5% SMD 0805 Resistors Any Any

47 1 R204 15 k 1/8 W min±5% SMD 0805 Resistors Any Any

48 2 R205, R230 100 k 1/8 W min±5% SMD 0805 Resistors Any Any

49 1 R207100 k 1/8 W min±0.05% SMD0805

Resistors Any Any

50 6R208, R209,R210, R211,R231, R232

1.5 k 1/8 W min±5% SMD 0805 Resistors Any Any

51 1 R213 620 1/8 W min±5% SMD 0805 Resistors Any Any

52 12

R215, R216,R217, R218,R219, R220,R221, R222,R223, R224,R225, R227

10 k 1/8 W min±5% SMD 0805 Resistors Any Any

53 1 R22626.1 k 1/8 Wmin ±0.1% SMD0805

Resistors Any Any

54 1 R22948.7 k 1/8 Wmin ±5% SMD0805

Resistors Any Any


UM2304 - Rev 3 page 30/46


55 1 SIOV100

S14K300 300Vac diameter 14mm pitch 7.62mm

MVO Any Any

56 1 SIOV101 Not connected MVO Any Any

57 1 SW100 Switch 10 A SPST Arcolectric H8800VACL13

58 1 SW200 3 points headerpitch 2.54 mm

3 contactheader Any Any

59 1 SW201 Switch 3positions DPDT Multicomp 1MD6T1B5M1QE

60 7

SW202,SW203,SW204,SW205,SW206,SW207, SW208

Micro switchSMD 6 mm x 6mm

SPST TE Connectivity FSM4JSMA

61 37

TP100...102,104…117,200…203, 205,207, 211, 212,214…217,219…226

Test points VeroTechnologies 20-2136

62 1 T200 Transformer Myrra 74015

63 4 U100, U101,U102, U103 TLP187 SO-6 Darlington

optocoupler Toshiba TLP187

64 1 U200 LF50ABVTO220-AB

5 V very lowdrop voltageregulator withinhibit

ST LF50ABV

65 1 U201 LF33ABVTO220-AB

3.3 V very lowdrop voltageregulator withinhibit

ST LF33ABV

66 1 U202 VIPER16HDSO-16

VIPerPlusfamily: energysaving 6 W highvoltageconverter withdirect feedback

ST VIPER16HD

67 1 U203 PC817X DIP4 Optocoupler Sharp LiteOn PC817X LTV817

68 1 U204 TS431AILT 1.24V SOT23-5

Low voltageadjustable shuntreference

ST TS431AILT

69 1 U205 TSV631ILTSOT23-5

Rail-to-rail input/output 5 VCMOS Op-Amp

ST TSV631ILT

70 1 X101 T1635T-8FP 16A TO-220FP

16 ASnubberless™Triac

ST T1635T-8FP

71 1 X102 ACST310-8B 3A DPAK

Overvoltageprotected ACswitch

ST ACST310-8B

72 1 X103 ACS108-8TN0.8 A SOT-223

Overvoltageprotected ACswitch (ACS™)

ST ACS108-8TN


UM2304 - Rev 3 page 31/46



https://www.st.com/en/product/viper16

https://www.st.com/en/product/TS431

https://www.st.com/en/product/TSV631

https://www.st.com/en/product/T1635T-8FP

https://www.st.com/en/product/ACST310-8B

https://www.st.com/en/product/ACS108-8TN


73 3 Screw M3 M3 Lenght 6mm Screw Any Any

74 2 Nut M3 M3 Lenght 2mm Nut Any Any

75 4 Board support M4 Lenght 2mm

Support standwith lock Any Any

76 1 Fuse 10 A / 250 V 5 x20 mm Fuse Any Any

77 2Femaleconnector 2*17pts

2x17 pointspitch 2.54 mm Connector Any Any

78 1 Ribbon 34 pts34 contactspitch 1.27 mm28 AWG

Ribbon cable Any Any

79 1 Short circuitjumper Pitch 2.54 mm Jumper Any Any

80 2 Heatsink35°C/W

35 °C/W 13.2 *6.35 * 19 mm Heatsink Any Any

81 1 Heatsink17°C/W

17 °C/W 16.26 *16.26 * 25.4mm

Heatsink AAVIDThermalloy 581002B02500G


UM2304 - Rev 3 page 32/46

7 STEVAL-GLA001V1 silkscreen TOP

Figure 40. STEVAL-GLA001V1 silkscreen TOP

UM2304STEVAL-GLA001V1 silkscreen TOP

UM2304 - Rev 3 page 33/46

8 Test points

Table 8. Test points

Voltage reference Name Description

Referenced to high voltage(connected to mains voltage)

Line Mains voltage line

Neutral Mains voltage neutral (after input switch and fuse)

Drain Viper drain

L_ZVS Line on optocoupler for ZVS function

N_ZVS Neutral on optocoupler for ZVS function

COMP Viper comp pin

VCC_AC Positive non regulated auxiliary power supply point

GND_AC Reference non regulated auxiliary power supply point

G1I T1 gate signal

G2I T2 gate signal

G3I T3 gate signal

OUT1 T1 A2 voltage

OUT2 T2 OUT voltage

OUT3 T3 OUT voltage

Referenced to insulated voltage(insulated from mains voltage)

VDD Power supply (5V or 3.3V)

3.3V OUT 3.3V power supply

GND GND

5VDC 5V power supply

VOUT Flyback output voltage

ZVS ZVS signal

G1 T1 gate signal

G2 T2 gate signal

G3 T3 gate signal

LED1 LED1 signal

LED2 LED2 signal

LED3 LED3 signal

MODE MODE signal

LED4 LED4 signal

T1 T1 push button signal



TP+ TP+ push button signal

TP- TP- push button signal

Power Time + Power Time + push button signal

Power Time - Power Time - push button signal

UM2304Test points

UM2304 - Rev 3 page 34/46

9 AC switch gate control dimensioning

Gate current IG is required to switch an AC switch ON. This IG current should be higher than the triggering gatecurrent IGT given in the AC switch datasheet. This parameter is temperature dependent, so recalculation isrequired if a parameter like ambient temperature changes.The STEVAL-GLA001V1 evaluation board embeds three AC switches and all gate control circuits have beencalculated to ensure turn-on for ambient temperature from 0 to 60 °C. It also takes into account fluctuation onVCC_AC voltage (non-regulated auxiliary voltage referenced to mains voltage) from approximatively 13 V to 21 V.In case of schematic use in another design, you must recalculate the gate control circuit, especially the RGresistor (R103 or R106 or R115+R117 pair). Refer to the formulas below to adjust RG resistor values.

X101 Triac

X101 is a T1635T-8FP Triac. The figure below gives the IGT parameter value and its variation versus thetemperature

Figure 41. T1635T-8FP datasheet extract

At 0 °C ambient temperature IGT * 1.26 = 44 mA is needed to ensure Triac activation. Considering this current andVCC_AC minimum voltage, the gate resistors calculation is:R115 + R117 = V R115 + R117IG min = VCC_AC min + VGT max − VCEsatIG min = 13 + 1.3− 0.544 × 10−3 = 313 ΩThe nearest normalized value is 150 Ω.You can calculate maximum power in the resistors considering VCC_AC maximum voltage:IG max = V R115 + R117R115 + R117 = VCC_AC min + VGT max − VCEsatR115 + R117 = 21 + 1.3− 0.5300 = 73 mAPR115 = R115 × IG max2 = 0.8 WTherefore, R115 and R117 are 150 Ω/2 W resistors.

Note: Use the above formulas to recalculate resistor values in case of schematic use in another design with a differentambient temperature.

X102 AC switch

X102 is an ACST310-8B AC switch. The figure below gives the IGT parameter value and its variation againsttemperature.

UM2304AC switch gate control dimensioning

UM2304 - Rev 3 page 35/46


Figure 42. ACST310-8B datasheet extract

At 0 °C ambient temperature, IGT * 1.4 = 14 mA is required to ensure Triac activation. Gate-cathode resistor (RGK= R110) current should be considered in the calculation as it is significant. In this case, the required IG is:IG min = VGTR110 + 14 mA = 1.1220 + 14 mA = 19 mAConsidering this current value and the VCC_AC minimum voltage, the gate resistor calculation is:R106 + R107 = V R106 + R107IG min = VCC_AC min + VGT max − VCEsatIG min = 13 + 1.1− 0.319 × 10−3 = 726 ΩThe nearest normalized value is 374 Ω.You can calculate maximum power in the resistors considering VCC_AC maximum voltage:IG max = V R106 + R107R106 + R107 = VCC_AC min + VGT max − VCEsatR106 + R107 = 21 + 1.1− 0.3748 = 29 mAPR106 = R106 × IG max2 = 0.31 WTherefore, R106 and R107 are 374 Ω/0.5 W resistors.


X103 AC switch

X103 is an ACS108-8TN AC switch. The figure below gives the IGT parameter value and its variation againsttemperature.

Figure 43. ACS108-8TN datasheet extract

At 0 °C ambient temperature, IGT * 1.6 = 8 mA is required to ensure Triac activation. Gate-cathode resistor (RGK =R111) current should be considered in the calculation as it is significant. In this case, the required IG is:


UM2304 - Rev 3 page 36/46

IG min = VGTR111 + 14 mA = 1220 + 8 mA = 12.5 mAConsidering this current value and the VCC_AC minimum voltage, the gate resistor calculation is:R103 + R104 = V R103 + R104IG min = VCC_AC min + VGT max − VCEsatIG min = 13 + 1− 0.312.5 × 10−3 = 1096 ΩThe nearest normalized values are 560 Ω.You can calculate maximum power in the resistors considering the VCC_AC maximum voltage:IG max = V R103 + R104R103 + R104 = VCC_AC min + VGT max − VCEsatR103 + R104 = 21 + 1− 0.31120 = 19 mAPR103 = R103 × IG max2 = 0.21 WTherefore, R103 and R104 are 560 Ω/0.5 W resistors.



UM2304 - Rev 3 page 37/46

10 STEVAL-GLA001V1 power losses

STEVAL-GLA001V1 evaluation board generates limited standby power losses due to the components directlyconnected to the mains voltage and to the secondary side power supply, including:• ZVS circuit• LED circuit (high voltage presence)• MODE switch circuit• Power supply regulation circuit (secondary)• LED circuit (VDD voltage)

Standby power losses measurement has been performed using a power meter under the following conditions:• Vmains = 240 Vrms / 60 Hz• Tamb = 22 °C• VDD = 5 V (worst case)• MODE switch in On/off position (worst case)

Table 9. Typical STEVAL-GLA001V1 standby losses

Vmains I(input) P(input)

240 V / 60 Hz 10 mA 288 mW

UM2304STEVAL-GLA001V1 power losses

UM2304 - Rev 3 page 38/46


11 IEC61000-4-4 performance

STEVAL-GLA001V1 AC switches have been tested according to IEC61000-4-4 test. This test allows assessmentof the AC switch robustness against electrical fast transients.

Figure 44. IEC61000-4-4 test with STEVAL-GLA001V1

Measurements were performed under the following conditions:• Vmains = 230 Vrms / 50 Hz• Tamb = 22 °C• STM32 Nucleo board connected and supplied by STEVAL-GLA001V1• 5 kHz - burst duration = 15 ms and repetitive burst period = 300 ms• 100 kHz - burst duration = 0.75 ms and repetitive burst period = 300 ms• Test duration: 1 minute

1. Criteria A: The aim of this test is to withstand 2 kV transient under normal operation (no abnormal behaviorallowed during and after the test). For this criteria, the test is done twice: first with X101 in phase controlmode (to check the normal AC switch operation) and with X102 and X103 OFF (to check that there is nospurious turn-on); the second time with X103 in phase control mode and with X101 and X102 OFF.

2. Criteria B: The aim of this test is to withstand 4 kV transient with normal operation at the end of the test(operation temporary disturbed allowed if followed by a self-recovery). For this criteria, the test is done twice:first with X101 in phase control mode (to check the normal AC switch operation) and with X102 and X103OFF (to check if there is spurious turn-on); the second time with X103 in phase control mode and with X101and X102 OFF.

3. Tests results: Tests results are given in following table.

Table 10. IEC61000-4-4 test results

Frequency 5 kHz 100 kHz

Coupling L+ L- N+ N- L+ L- N+ N-

2 kV Criteria A Pass Pass Pass Pass Pass Pass Pass Pass

4 kV Criteria B Pass Pass Pass Pass Pass Pass Pass Pass

UM2304IEC61000-4-4 performance

UM2304 - Rev 3 page 39/46


12 AC switch performance improvements

You can improve AC switch performance in several ways, such as adding a snubber, a RGK or a varistor. Thefollowing table summarizes the configurations.

Table 11. Tips for AC switch performance improvement

AC switch IEC61000-4-5 orovervoltage IEC61000-4-4 or dV/dt Commutation

X101 Add a MOV (stronglyrecommended) Add a RGK No need

X102 No need Modify RGK or add a snubber Add a snubber

X103 No need Modify RGK or add a snubber Add a snubber

The following tips can help improve the behavior for each AC switch reference.1. X101 Triac

X101 is a snuberless Triac; it doesn’t need a snubber to improve commutation performance. You should adda varistor to protect the Triac against overvoltage: varistor reference depends on the applied voltage level.You can also add a RGK to improve dV/dt robustness and therefore IEC61000-4-4, if higher than 2 kV criteriaA (or 4 kV criteria B) levels are required.

2. X102 AC switchX102 is an overvoltage protected AC switch; it does not need a varistor to protect it against overvoltage. Youcan add a snubber to improve commutation performance. You can also modify the RGK value (R110) or adda snubber to improve dV/dt robustness and therefore IEC61000-4-4 if higher levels are required.

3. X103 AC switchX103 is an overvoltage protected AC switch; it does not need a varistor to protect it against overvoltage. Youcan add a snubber to improve commutation performance. You can also modify the RGK value (R111) or adda snubber to improve dV/dt robustness and therefore IEC61000-4-4 if higher levels are required.

UM2304AC switch performance improvements

UM2304 - Rev 3 page 40/46

Revision history

Table 12. Document revision history

Date Version Changes

04-Dec-2017 1 Initial release.

23-Mar-2018 2 Minor text changes.

24-Jan-2019 3Minor text and formatting changes.

Updated Section 6 Bill of materials.

UM2304

UM2304 - Rev 3 page 41/46

Contents

1 Evaluation board objectives . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2

1.1 What does this demoboard aim to demonstrate? . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

1.2 STEVAL-GLA001V1 evaluation board main blocks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

1.3 Targeted applications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

1.4 Main used part numbers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

1.5 Operating range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

1.6 Performance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

1.7 AC switch load capability . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

2 Getting started . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5

2.1 Safety instructions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

2.2 STEVAL-GLA001V1 evaluation board insulation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

2.3 Board connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

2.4 STEVAL-GLA001V1 evaluation board start-up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

2.5 Hardware function description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

2.5.1 Power supply: primary side . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

2.5.2 Power supply: secondary side. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

2.5.3 VDD selector. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

2.5.4 Push buttons. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

2.5.5 LEDs. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

2.5.6 Switch mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

2.5.7 Gate control: primary side (high voltage). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

2.5.8 Gate control: secondary side (insulated voltage). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

2.5.9 ZVS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

3 Evaluation board operation with STM32 Nucleo board. . . . . . . . . . . . . . . . . . . . . . . . . . . . .13

3.1 Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

3.2 Triac control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

3.3 Operating mode. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

3.3.1 Mode selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

3.3.2 ON/OFF basic mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

3.3.3 ON/OFF timer mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

UM2304Contents

UM2304 - Rev 3 page 42/46

3.3.4 Phase control mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

3.4 ZVS function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

3.5 Fault LED . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

3.6 User interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

4 Evaluation board operation without STM32 Nucleo board . . . . . . . . . . . . . . . . . . . . . . . . .22

4.1 User connector inputs and outputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

4.2 MODE switch voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

5 Schematic diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .24

6 Bill of materials . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .28

7 STEVAL-GLA001V1 silkscreen TOP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .33

8 Test points . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .34

9 AC switch gate control dimensioning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .35

10 STEVAL-GLA001V1 power losses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .38

11 IEC61000-4-4 performance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .39

12 AC switch performance improvements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .40

Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .41

UM2304Contents

UM2304 - Rev 3 page 43/46

List of tablesTable 1. Load capability versus ambient temperature and AC switch. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4Table 2. MODE signal voltage versus switch position . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10Table 3. Modes and gate controls available vs zvs circuit implementation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19Table 4. Readable parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20Table 5. Configurable parameters. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21Table 6. User connector pin description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22Table 7. STEVAL-GLA001V1 bill of materials . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28Table 8. Test points . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34Table 9. Typical STEVAL-GLA001V1 standby losses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38Table 10. IEC61000-4-4 test results . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39Table 11. Tips for AC switch performance improvement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40Table 12. Document revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41

UM2304List of tables

UM2304 - Rev 3 page 44/46

List of figuresFigure 1. STEVAL-GLA001V1 evaluation board (top view) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1Figure 2. STEVAL-GLA001V1 evaluation board synoptic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3Figure 3. Loads connection versus AC switches . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4Figure 4. High voltage and insulated voltage on STEVAL-GLA001V1 evaluation board . . . . . . . . . . . . . . . . . . . . . . . . . 5Figure 5. STEVAL-GLA001V1 evaluation board connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6Figure 6. SW200 jumper . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7Figure 7. STEVAL-GLA001V1 evaluation board power supply primary side components . . . . . . . . . . . . . . . . . . . . . . . . 8Figure 8. STEVAL-GLA001V1 evaluation board power supply secondary side components . . . . . . . . . . . . . . . . . . . . . . 8Figure 9. STEVAL-GLA001V1 evaluation board VDD selector components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9Figure 10. STEVAL-GLA001V1 evaluation board push button components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9Figure 11. STEVAL-GLA001V1 evaluation board LED components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10Figure 12. STEVAL-GLA001V1 evaluation board mode components. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10Figure 13. STEVAL-GLA001V1 evaluation board AC switch gate control (primary side) components. . . . . . . . . . . . . . . . 11Figure 14. STEVAL-GLA001V1 evaluation board AC switch gate control (secondary side) components. . . . . . . . . . . . . . 11Figure 15. ZVS signal versus mains voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12Figure 16. STEVAL-GLA001V1 evaluation board ZVS components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12Figure 17. Ways to control the STEVAL-GLA001V1 evaluation board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13Figure 18. Connection setup between for STEVAL-GLA001V1 evaluation board, X-NUCLEO-IHM09M1 connector expansion

board and NUCLEO-F030R8 development board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13Figure 19. Triac behavior according to gate control and latching current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14Figure 20. ON/OFF control in basic mode (DC command on the left and pulse command on the right) . . . . . . . . . . . . . . 15Figure 21. ON/OFF control in timer mode (DC command on the left and pulse command on the right). . . . . . . . . . . . . . . 16Figure 22. Phase control (zoom on the right) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17Figure 23. td value table details . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17Figure 24. Soft-start operation (on the left) and soft-stop operation (on the right) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18Figure 25. ZVS signal versus mains voltage (zoom on the right) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18Figure 26. Parameters in case of inductive load (example on the right) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18Figure 27. Parameters for phase control mode. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19Figure 28. User interface list of commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20Figure 29. User connector pinning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22Figure 30. STEVAL-GLA001V1 - AC input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24Figure 31. STEVAL-GLA001V1 - ZVS detection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24Figure 32. STEVAL-GLA001V1 - Triac gate control. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25Figure 33. STEVAL-GLA001V1 - Triacs/ACS connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25Figure 34. STEVAL-GLA001V1 - Power supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26Figure 35. STEVAL-GLA001V1 - LED indicators. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26Figure 36. STEVAL-GLA001V1 - Commands/parameters push buttons . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26Figure 37. STEVAL-GLA001V1 - Mode selector switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27Figure 38. STEVAL-GLA001V1 - Customer board connector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27Figure 39. 34-Pin ST board connector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27Figure 40. STEVAL-GLA001V1 silkscreen TOP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33Figure 41. T1635T-8FP datasheet extract . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35Figure 42. ACST310-8B datasheet extract. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36Figure 43. ACS108-8TN datasheet extract . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36Figure 44. IEC61000-4-4 test with STEVAL-GLA001V1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39

UM2304List of figures

UM2304 - Rev 3 page 45/46

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UM2304

UM2304 - Rev 3 page 46/46

Documents

Insulated AC switch control evaluation board for home ... · Insulated AC switch control evaluation board for home appliances UM2304 User manual UM2304 - Rev 3 - January 2019 For